AO4803A

Overview

The AO4803A is a dual P-channel enhancement mode MOSFET array manufactured by Alpha & Omega Semiconductor Inc. It features a drain-source voltage (Vdss) of 30V and a continuous drain current (Id) of 5A at 25°C. The device exhibits a maximum on-resistance (Rds(on)) of 46 milliohms at Vgs=10V and Id=5A, with a gate threshold voltage (Vgs(th)) of 2.5V max at 250µA. Key electrical parameters include a maximum gate charge (Qg) of 11nC at 10V and an input capacitance (Ciss) of 520pF at 15V. It operates within a junction temperature range of -55°C to 150°C, dissipates up to 2W of power, and is housed in an 8-SOIC surface-mount package.

Feature Summary

• Dual P-channel configuration integrating two independent channels in a single compact package for space-constrained designs.
• Logic-level gate drive capability allowing direct interfacing with standard logic outputs without additional level shifting.
• Low on-resistance characteristic optimized for efficient power switching and minimal conduction losses in load switch applications.

Applications

• Load switching circuits requiring dual channel control
• Battery protection modules for portable electronics
• Power management units in consumer devices

Procurement Notes

Verify component authenticity through authorized distribution channels or manufacturer-direct procurement. Confirm the specific ordering suffix matches the required packaging format, such as tape and reel or cut tape, prior to purchase. Ensure the supplier provides valid traceability documentation and compliance certificates to guarantee component integrity and adherence to specified technical standards.

Selection Notes

Select this component when a dual P-channel solution is required with a 30V voltage rating and 5A current capacity. Verify that the 8-SOIC package dimensions fit the PCB layout constraints. Ensure the driving circuit can supply sufficient gate voltage to achieve the specified low on-resistance performance under the expected operating temperature conditions.

Part Context

The AO4803A belongs to the AO4803 family of dual P-channel MOSFET arrays from Alpha & Omega Semiconductor. It shares the same basic product architecture but may differ in specific electrical tolerances or manufacturing revisions compared to the base model. This variant is designed for high-density surface-mount applications requiring reliable dual-channel switching capabilities.

Replacement Considerations

Direct substitutes are not explicitly confirmed in public documentation. Evaluate alternatives based on matching pinout, voltage ratings, and package type. Verify compatibility with existing thermal and electrical design parameters before implementation.